PT4.S4.Q9 - A scientific theory is a good theory if it satisfies two requirements

7sagerJim7sagerJim Core Member
edited April 2021 in Logical Reasoning 18 karma

Anybody wants to shed some light on the LAWGIC aspect of this question?

Apparently, according to PowerScore explanation, the stimulus is a bi-conditional relationship because of the phrase "if it satisfies two requirements".
Therefore, the bi-conditional relationship is as follows:

Accurately Describes using a few elements AND Make Definite Predictions <---> Good theory.

Would the contrapositive of above become:

/Good theory <---> /Accurately Describes using a few elements OR /Make Definite Predictions?

Admin note: edited title; please use the format of "PT#.S#.Q# - [brief description]"

Comments

  • Jordan JohnsonJordan Johnson Member ⭐
    edited April 2021 686 karma

    Yes, you typed it the correct way.

    When there are multiple pieces to one side of a bi-conditional, I generally picture that whole set in parentheses and negate it.

    For instance, this statement:
    ( A + B ) <--> C
    ... would have this contrapositive:
    /C <--> /( A + B )
    ... which translates to:
    /C <--> /A or /B
    (you always switch AND to OR, and vice versa, when determining the contrapositive using this method).

    Hope that helps!

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